Telegraphic selective system.



.No. 897,662 PATENTED SEPT. 1, 1908. v

A. M. ROBERTS. TELEGRAPHIO SELECTIVE SYSTEM.

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APPLICATION FILED DEG.6,190G.

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A. M. ROBERTS. TELEGRAPHIO SELECTIVE SYSTEM.

APPLICATION FILED DEO.6,1906.

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venZwz No. 897,662. PATENTED SEPT. 1, 1908. A. M. ROBERTS.

, TELEGRAPHIG SELECTIVE SYSTEM.

APPLICATION FILED DEC.6,1906.

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TELEGRAPHIJ SELECTIVE SYSTEMJ APPLICATION FILED 1) .6 1906.

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No. 897,662; PATBNTED SEPT. 1 190's.

, M. ROBERTS. TELEGRAPHIG' SELECTIVE SYSTEM.

APPLICATION FILED DEG.6,1906.

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4 fn vinzmf ili'znesses PATENTED SEPT. 1, 1908. A. M. ROBERTS.

TELEGRAPHIG SELECTIVE SYSTEM.

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- PATENTED SEPT. 1, 1 908. A. M. ROBERTS.

TELEGRAPHIG SELECTIVE SYSTEM.

' APPLICATION FILED DEG.6,1906.

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hurrah J @FFMJE TELEGRAPHIC SELECTIVE SYSTEM.

Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed December 6, 1906. Serial No. 3%,641:

T all whom it may concern.

Be it known that I, ALFRED Moss ROB- nn'rs, a citizen of the United States, residing at Bu'll'alo, in the county of Erie and State of New York, have invented a new and useful linprovcment in Telegraphic Selective Systems, of which the following is a spcci'lication.

graph systems in which. each letter, charac ter or signal is transmitted by a number of successive electric in'lpulses, which are automatically switched or directed to the individual mechanism or instrunicntality which causes the printing, recording or indicating ol such particular letter, character or signal.

in the telegraphic system which forms the subject matter of this appl cation each letter, character or signal is transmitted and re 'n'csentcd by the same, number of successive impulses and. both positive and negative impulses are employed, the dill'ercnt letters, characters or signals being identiiieu and difli-srentiz'rted by the order of the successive impulses. Those impulses may be of the same length or duration and. need not be any longer than necessary to eliect the desired movement or action in the receiving instrument. employed for each letter, character or signal may be more or less as the number of dill'erent letters, characters or signals which are to be transmitted may render necessary. For illustration, ii' the system requires the transmission ol letters, characters or signals not exceeding thirty-two in number, live impulses for each charactc r or signal will sull'icc. in such a system the letter a" may be represented and trai'ismitted byfive successive plusimpulses the letter b bylour plus and aiinal minus impulsc( e the letter c by three plus, minus, and a iinal plus impulse l and so on. lhese impulses actuate a relay which moved out of its normal or zero position by each impulse and this movement of the relay takes place in one direction ii the transmitted impulse is plus and in the opposite direction if it is minus. These movements of the relay cause a current to be sent by successive automatic switching devices to the. individual magnet b V' which the transmitted letter, character or signal is recorded or indicated.

The apparatus contains as many series of magnets and switches as successive impulses are contained in the group which represents This invention relates to that class of tele- The number of impulses which are a character. The apparatus represented in the accompanying drawings is constructed for a group of iive impulses and contains five series of magnets and switches. The first impulse of the group is directed to a magnet in the first series; the second. impulse to a magnet in the second series the third. impulse to a magnet in the third series; the fourth impulse to a magnet in the fourth series, and tho fifth impulse to a magnet in the fifth or last series, which magnet causes the printing, recording or indicating oi the specific letter, cha actor orsigual represented by the group oi" impulses. Each switcl'iing operation after the first is controlled by and dependent upon. all of the prior switching operations which have already been cliected.

in the accompanying drawings, consisting of seven sheets: Figure 1 is a diagram illustratii'ig the general scheme of switching through the ,diiierent series of magnets. Figs. 2, 3 and. 4 are diagrams representing, respectively, the central, theleft hand portion and the right hand. portion of the apparatus. Fig. 5 is a diagram, on an enlarged scale, showing the lirst and second series of magnets and connecting parts. Fig. 6 is a fragmentary diagram, showing magnets in all of the five series and the circuit breakers in the binding circuits. Fig. '7 is a fragmentary diagram, showing some of the magnets of the lirst andsecond series and connecting parts in different positions. Fig. 8 is anenlarged view of one of the magnets.

Like letters and numerals of reference re- For to like parts in the several figures.

A represents the actuating relay whichmay be of any suitable construction causing the relay to be moved out of its normal or zero position in one direction when a plus impulse is received and in the opposite direction when a minus implus is received. the construction shown the relay is an electic-magnet which is energized by a battery and mounted on an elastic arm 22- between two impulse receiving magnets 23 and 24. The latter are energized by the impulses received over the main line 25 in which these magnets are arranged. These magnets are so wound that the poles which they present to the poles of the relay magnet 20 are energized in the same sense, both plus or both minus, by the same impulse which passes through the windings of both magnets. ()ne pole of the relay magnet is therefore adjacent to a like pole and the other adjacent to an unlike pole oi the impulse receiving magnets, and one pair of poles act to attract and the other to repel the relay magnet, so that both forces tend to 'IIIOVQ the relay magnet in the same direction. One of the impulse receiving magnets 23 0r 24 may be replaced by aniron abutment and a permanently polarized armature may be substituted .l'or "he electro-magnet 20. The relay is'held in its normal or zero position, shown'in Figs. 2 and 5, by the clas or bytic arm 22 on which it is mounted, other suitable means.

The impulses may be produced at the sending stat-ion B by any suitable means, for instance, as indicated in Fig. 5, by a per forated ribbon 30 passing over a condiuzting roller or surface 31, which is grounded at 32, and two brushes 33 34 adapted to make con.- tact with the roller through two rows of perforations in the strip which represent the letters, characters or signals to be transmitted, These brushes are connected with two batteries 35 36 in such manner: that one brush produces plus impulses and the other minus impulses. The main line 25 extends through the winding of a circuit breaking magnet 37 and is grounded at 38. This magnet is energized every time an impulse passes through the main line, and opens a circuit breaker 39 in a zero indicating line 4-0.

The impulses are sent successively through the main line 25 and each impulse causes the relay magnet 20 to move out of its normal or zero position in one or the other direction, according to the r'raturo ol the impulse. Upon the cessation ol' each impulse the relay magnet is returned to its zero or normal position by the reaction of the spring arm to which it-is attached, or other suitable means.

For the purposes of this description it will be assumed that the winding of the impulse receiving magnets 2.; and 24 is such thata plus impulse will cause the magnets 23' and 2-1 to present their positive polcs to the relay magnet \Vhen a plus impulse is sent through the main line the r-orc ol' the rclay magnet 2U will be moved against the impulse receiving magnet 23, and when a minus impulse is sent the relay magnet wiil be moved against the magnet 24, as represented in Figs. 6 and T. A group of live successive impulses will move the relay magnet in this nranncr live times in succcssion out ol' its normal position. This movemcnt ol' the relay magnet 20 is utilized to send. a current through one ol' two selecting magnets (l and (3". ll" the relay is actual/ml by a plus impulse the plus magn t is encrgized and it a minus impulse is scnt the minus magnet is energized. The current for energizing the magnets is generated in a battery 'll which is connected with the relay in. such. manner that the movement ol tl e relay by a plus impulse closes a circui t through the selecting magnet C, while the movement of the relay by a minus impulse closes a circuit through the selecting magnet C The drawings show a simple and convenient way of arranging the necessary conductors for this )urposo by utilizing the spring arm 22 oi the relay 20, the core of this relay and the cores of the impulse receiving magnets 23 and 24. The battery 4]. is connected with the spring arm 22 by a conductor 42 and the spring arm is connected with the core of the relay magnet. The core of, the receiving magnet 23 is connected by a conductor 43. with an armature switch 44 making contact, in its normal position, with the contact 45 of a conductor 46 in which the coil of the plus selecting magnet C is arranged and which extends from that coil to a contact 47. An armature switch 48 makes contact with the latter in its normal position and a branch conductor 49 extends from that switch to a conductor50 which connects with the battcry 4].. The core of the receiving magnet 24 is similarly connected with thecoil of the minus selecting magnet U by a conductor 51, an armature switch 52, contact .33, a conductor 54, in which the coil or this selecting magnet is arranged and which extends from that coil to a contact 55, an. armature switch 56 and a conductor 57 which connects with the conductor 50 leading to the battery 4].

When. the core of the relay magnet 20 is throwninto contact with the core of the receiving magnet 23 by a plus impulse, the circuit is closed through the coil of the plus sclccting magnet (3 and the current runs trom the battery 41. through the conductor 42, spring arm 22, the core of the relay 20, the core of the receiving magnet 23, conductor 43, and. described connecting parts and energizes the magnet (I. If the relay magnet is thrown into contact with the core ol the receiving n-r'agnet 24 by a minus irn pulse, the current is closed through the cog ol the minus selecting magnet and the current runs through the conductor 51 and dcscr'ibcd connecting parts and energizes this magnet.

Vhcn the plus selecting magnet is energized it attracts the armature switch 56, which in its normal position, shown in Fig. 5, is in contact with the contact ol' the condnctor 54,'an l this breaks the circuit through the conductor 54, the coil ol" the minus selecting magnet and the conductor 5 1v at the contact 55 and. cuts out the minus. selecting magnet (7 and connecting parts.

When the minus selecting magnet (1" is energized it attracts the armature switch 48, which. in its normal position, shown in Figs. 2 and 5, is in contact with the contact 47 of the conductor 46, in. which the coil of; the plus selecting magnet (l is arranged, and breaks the circuit at the contact 47, thereby this closes a circuit through its core.

cutting out the magnet C and connecting parts.

The plus selecting circuit is closed through the armature switch 48, which is under the influence of the minus selecting magnet C and the minus selecting circuit is closed through the armature switch 56, which is under the influence of the plus selecting magnet C. By energizing one oi these selecting magnets the circuit through the other opened and the parts controlled by suchmagnetare rem ered inactive. in order to make sure that the effect of one impulse is exhausted before the next following impulse takes place, in other words, to avoid conflict between or a running together of successive impulses, a secondary or auxiliary magnet is combined with each selecting magnet in such manner that .the secondary circuit, in which the coil ol' such secondary magnet is arranged, is closed so long the relay stands in its zero or normal position and is open when the relay is moved out of this position by an impulse.

U represents the secomlary magnet of the plus selecting nnignet (l and U the secondary magnet of the minus selecting magnet C" in the drawings the selecting magnets are indicated by reference letters with even exponents or without exponents and the secondary magnets by reference letters with odd exponents.

The core of each selecting magnet is connected with the coil of its secondary magnet in such manne that when the selec ring magnet is energized a circuit is closed through the coil of the secondary magnet. The core of the plus selecting magnet C is connected by a conductor 60 with the coil 01 its secondary magnet C and this coil is connected with the conductor 40 of the zero indicating circuit, in which the circuit breaker 39 is arranged. This line also contains an additional circuit breaker 6] which makes contact in its nor- 'mally closed. position with the contact 62.

When the plus selecting magnet C is energized it attracts its armature switch 56 and this closes a circuit through its core. The current now passes from the battery 41 through the conductor 40, the circuit breaker 39, the circuit breaker 61, the coil of the secondary magnet (,1, the conductor (H), the core of the selecting magnet C, the armature switch 56 and the conductors and back to the battery. the core of the minus sc lecting magnet C" is connected by a conductor (ii-3 with the coil of its secondary magnet U and this coil. connected by a conductor 6 with the conductor 40.

When. the minus selecting magnet (J is energized it attracts its armalure switch 48 and The current now passes from the battery ll through the conductor 4-0, 1 hecircuitbreaker 39, the circuit breaker (51, the conductor er,

the coil of the secondary magnettl the conductor 63, the core of the selecting magnet C the armature switch 48, and the conductors 49 and 50 back to the battery. These secondary circuits are closed only when the circuit breaker 39 is closed and this circuit breaker is closed only when no current is lishes a circuit through the core of that magnet, while the circuit through the coil of its selecting magnet is opened, thus compelling subsequent current through the selectu'ig circuit to pass through the core of the secondary magnet and not through the coil of the selecting magnet. This renders a subsequent current through the selecting circuit of no eil'ect uponthe selecting magnet. For illustration, when the plus secondary magnet C is energized it attracts its armature switch 44, whereby the circuit through the coil of the selecting magnet C is opened at the contact 45 and a circuit is established through the core of the secondary magnet C.

The first impulse of a transmitted group of impulses, representing a certain letter, character or signal, acts through the relay upon one of the selecting magnets C and C and its armature switch in such manner that it first causes the corresponding selecting magnet to ture switch, and this opens the circuit through be energized. This magnet attractsits armathe other selecting magnet and at the same time-establishes a circuit throughthe core of the selecting magnet and the coil of the cor' responding secondary magnet. This last named circuit is, however, not completed until the l irst impulse has ceased. When this takes place the circuit breaker 39 in the secondary circuitfl"! is closed and this completes the circuit through the coil. of the secondary n'iagnet. The latter is now energized and attracts its armature switch and this cuts out the coil of the corrcspornling selecting magnet, rendering that magnet inactive, and establishes a circuit through the core of the sec ondary magnet. The current from the battery 41 now passes through the coil of the secondary magnet until the next following impulse passes through the main line,'when the circuit breaker 39 is opened and the sec ondary circuit is broken.

The first series of selecting magnets com- C This first series of selecting magnets followed by a second series which comprises two groups of magnets, each Consisting of a plus and a Imnus'selecting magnet and two corresponding secondary magnets. One of of these groups'is controlled by the plus magnet "fl and the other by the minus magnet U of the first series.

Leaving the secondar tmagnets out of consideration, the general scheme of auton'iatic switching may be explained by reference to the diagram Fig. 1, as follows: The current from the battery 41 is switched by the action of the relay under the first impulseto the plus selecting magnet C, if a plus impulse is received, or to the minus selecting magnet C if a' minus impulse is received. The second i1npulse causes the current to be switched to one of the selecting magnets ol' the second 'series. If the first impulse was plus and the second'impulse is also plus, the current is switched to the plus magnet l) of the second series. It the first impulse was plus and the second is minus, the'current is switched to the minus nnwnet D'-of the second series. If the first i-mpu se was minus and. the second impulse is plus, the currcut will be switched tov the plus magnet D" of the secondserics, and if the second impulse was also minus thecurrent will be switched to the minus magnet l) of the second series. The third impulse causes the current to be switched to a select ingmagnet of the third series. For illustration, if the first and second impulscs wcre plus and the third is also plus, the current will be switched .to the plus magnet lC- of the third series, and if the third impulse is minus the current will be switched to the minus magnet E Y The described switching of the system, in which each selecting magnet of one series controls a plus and a minus magnet in the spectively.

next following series, can be extended through as many series oi selecting magnets as may be necessary to reach the number of final actuating magnets which'the.system requires. in the apparatus remescnted in the drawings the selecting magnets of the fourth series are marked l 1 F3. l to W" and their correspomlingsecondary magnets F l F to Fit, and. the final actuating magnets, thirty-two-in number, are marked G O G to G v D 1) 1) D represent the secondary magnets of the selecting magnets D D D" D, rc-

. -71-72 and. 73 represent the armature switches of the selecting magnets .l) l)'- .1)? D, and 74 75.76 and 77 represent them-unziture switches'of the secondary magnets l)-l) D D of the-secondseries.

The operation of the second series of 'inagnets maybe explained as follows: If the first impulse has been plus, the sec mdary magnet of the first series'has attracted its armateases mature switch 56, the core of". the lus select-- mg magnet C of the first serles, t e conductors 60 and. 80 leading to the armature switch 71 of the minus selecting magnet D of thesecond series, the contact 81, the conduct0r82 leading to the coil of the plustselec't- 111g magnet D ol the second series, the conductor 83 leading from that coil to the con tact 84, the armature switch 74 of the secondary magnet D, the conductor 85 leading to. the core of the secondary magnet C of the first series, the core of that magnet, the armature switch 44 thereof, the conductor 4;),

the core ofthe receiving magnet 23, the core of the relay 20, the spring arm 22'and the comluctor 2] to the battery 41. 'lhiscnergizes the plus selecting magnet D of the second series, which magnet attracts its armature switch 7t.),and this opens the circuit at the contact in. the conductor 9] connected with the coil of the minus selecting nlaguet D of the second series, cutting out that magnet, and closes the circuit through the core of the magnet D and the coil of its secondary magnct'D. Assuming that the first impulse has been. 'plus and the second minus, the circuit through the battery 4i will be closed. through the conductors 00,57, armature switch 56,

the core of the plus selccting magnet (l of the first series, the conductors 60 and 86, the-armature switch 70 of the plus selecting magnet I) of' the second series,'tl 1e contact 90, the

conductor 91, the coil of the minus selecting magnet D of the second series, the conductor 92, the contact 93 therein, the armatu re switch 75 of the secondary n1agnet D*of' the second series, the comluctor 94 leading l'rom'tlmt switch to the arnniture switch-53 of the secm'nlm' ma net of the first series theconductor5l the coreof. the receivin mae'netmt I f T" I thc'core ol' the relay 2(), the spring arm .22 and the comluctor 42' to the battery. This energizes the minus selecting magnetl)" of the second series,which magnet attracts its armature switch 71, breaking at tsl the circuit in which the. coil of the plus magnet Dis arranged and cutting out that magnet, at the same time establishing a circuitv through the core of the minus selecting magnet D and-the conductor 95 leading from that core to the coil of the secondary magnet D.

' The secondary magnet. D or D? is energized after the second impulse l-ias ceased in the uurnncr which has been described with reference to the secomlary magnets (1" and C of thefirst series, and this resultsin the energized secondary magnet attracting itsarmature, breaking the circuit through the coil of the corresponding selecting magnet the energized secondary magne The plus and minus selectlng magnets D nd establishing a circuit through the coil lof j,

. senses D and their secondary magnets l) D con stitute a group on the plus side of the second series, since they are controlled by the plus selecting magnet C of the first series and its secondary magnet C while the plus and minus selecting magnets D D of the second impulse has been minus and the second is also minus, the armature switch 48 of the minus selecting magnet C of the first series has made contact with the core of thismag net and the circuit through the coil of the plus selecting magnet C has been opened at 47, the armature switch 52 of the secondary magnet C has been closed against the core of that magnet, breaking the circuit at 53, as represented in Fig. 7. The circuit through the battery 41 is now closed through the conductor 49, armature switch 48, core of minus selectingmagnet C conductor 63, which is connected by conductor 1.00 with the armature switch 72 of the plus selecting magnet D of the second series, contact 101,

- conductor 102, the coil of the minus selecting magnet D, conductor 103, the contact 104 therein, the armature switch 77 of the secondary magnet D, the conductor 105 leading therefrom to the core of the secondary magnet C its armature switch 52 conductor 51, core of receiving magnet 24, and the relay to the battery. ,T he current passing through this circuit causes the minus selecting magnet D to attract its armature 78, breaking the circuit at the contact 106 in the .conductor 11)? leading to the coil of the plus selccting magnet D and establishing a circuit through the core of the minus selecting magnet D and the conductor 108 leading to the coil of the secondary magnet D The coil of the plus selecting magnet D is connected by a conductor 10$) withacontact 110 against Which the=armature switch 7 6 of the secondary magnet l) rests normally, and this switch is connected by a conductor 111 with the armature switch 44 of the secondary magnet The third series of magnets consists of four groups, each. controlled by one of theselect mg magnets'of the second series, as iollowsf diagram Fig. 1.

ondary magnets E E are controlled by the minus selecting magnet The plus selecting magnet E and the minus selecting magnet E and their secondary magnets E E are controlled by the plus selecting magnet D The pins selecting magnet E and the minus selecting magnet E and their secondary magnets E it are controlled by the minus selecting magnet D. The armature switches 120 to 135 of the third series of magnets are arranged and connected to operate in a manner similar to the armature switches previously described. The fourth series of magnets consists olieight groups,

j each controlled by one of the selecting magnets of the fourth series, as indicated in the The plus selecting magnet F and the minus selecting magnet F and their secondary magnets F F are controlled by the plus selecting magnet E of the thirdseries. The plus selecting magnet F and the minus selecting magnet F and their sec ondary magnets F F are controlled-by the minus selecting magnet E of the third se ries. The armature switches of the fourth series of magnets'are arranged and connected to operate like those previously described. The fifth series of magnets G to G consists of thirty-two actuating magnets arranged in pairs, each pair under the control of one of the selecting magnets of the fourth series. As indicated in Fig. 1, the plus magnet G and the minus magnet G are under the control of the plus selecting magnet F o'fthe fourth series, the plus magnet G and the minus magnet G are under the control of the minus magnet F of the fourth series, and so on.

The operation of these successive series of magnets and switches will be understood from the following illustrations, reference being had to F 6. Assuming that the first impulse was minus, the three next impulses plus and the last impulse minus, the parts which have been actuated will be in the positions represented in Fig. 6. In the first series of magnets the armature switches 48 and 52 of the minus selecting magnet C and its secondary magnet will rest against the cores of these magnets and the circuits will be broken at the contacts 47 and 53. I In the second series of magnets the armature switches 72 and 76 of the plus selecting magnet D" and its secondary magnet D will rest against the cores of these magnets and'the circuits will be broken at the contacts 101 and 110. In the third series the armature switches 12.) and 128 of the plus selecting magnet Ff and its secondary magnet E are closed against the cores of these magnets and the circuits are broken at the contacts 150 and 151. .111 the fourth series the armature switches 216 and 214 of he plus selecting magnet F and itssecondary magnet F are chased i, the cores of tl'iese iagnets and the , 100, the armature switch. 72, the core of the tar L01, the core of the secondary niagi'iet and 215. In the fifth. series of magnets the armature switch oi" the actuating magnet G is-closed. In. this position. of the parts the circuit through the battery 41 will be closed through the conductors 50, 49, the armature switch 48, the core oi the minus selecting magnet 0 the conductors ($3 and plus selecting magnet D of the second series, the conductors 300, 30 and 302, the. arinature switch 129 of the plus selecting magnet E of the third serirs, the core of that magnet, the conductors 225, 226, the armature switch 2160f the plus selecting magnet F of the third. series, the core of that magnet, the conductors 2 7, 228 and. 225), the coil of the actuating magnet G, the conductors 230, 231, 303, 105, the core ol the secondary magnet t)", the armature switch 52, the conductor 5], and so on to the battery. The current l'roni the batt .ry 41 passing through this circuit actuatcs the iinal magnet G and the movement so produced is utilized in any suitable manner to print, record or indicate the letter, character or signal represented by this magnet.

It the Jlilth impulse had been negative the circuit would have been closed from the con ductor 2128 through the conductor 400, the coil ol the actuating magnet (W, the conducl the arnnufiure switch 2M of that magnet, the conductor 232, the core ol the seiani'dary magnet IQ, the armature switch 1'28, the con ductor 10;, the core ol' the secoiulary magnet .l), the armature switch 70, and the conductors Ill, 43, and so on to the battery. ln the last nn-ntioncd case the final magnet Ur Would be actuated. llach magnet is provided with a binding coil 500 which is ener gizcd l'rom the battery 501. 'lhc binding coils ot thc several magnets of each series are coniwctcd with this battery in parallel. The binding coils ol' the lirst series ol magnets (l are connected with the conductors ll ll those ol' the second seizies with the conduc tors ll" ll, those ol the third series with the conductors ll' ll, those ol the fourth series n ith the conductors ll Il and those ol' the ilil'th series with the cornluctors ll ll. 'lhe binding circuit of each .niagnct is closed when tl i armature switch of the magnet is closed. This can be done in various ways, for instan ai, as shown, the arn'iature switch can be provided with an insulated contact piece 502, Fig. 8, which, when. the switch is closed against the core, closes the binding circuit by making contact with the contacts 503 and 504-.

The binding conductors ll il of the lit-st series, ll ll ol the second series, ll, ll of the third series and ll ll ol the fourth. series are connected in parallel with the main conductors ll l l ol the binding battery 50]. A l circuit breaker 505 is arranged in. the conductor [1" so that when the circuit is broken the binding circuits of the first four series of magnets are broken and the closed armature switches of these magnets are released and returned to their normal positions. This circuit breaker is actuated by a magnet 506. The dead- I int or zero circuit otwhich the coiuhmtor &0 forms part is provided With a circuit breaker 61 which is opened by an'iagnct 510, the coil of which is arranged in the binding circuit of the second series, for in-' stance, in the conductor H, so that when a current passes through this circuit, that is to say, when one of the armature switches of the second circuit is closed, the dead. point or zero circuit of the first series of magnets is opened. Similar circuit breakers 51], 512 and 513 a re arranged in the zero circuits 514, 515 and .316 of the second, third and. fourth series ol magnets, 'which circuit breakers are opened by magnets 517, 518 and 519 in the binding circuits ol the third, fourth and fifth series, so that as one binding circuit is closed al't-cr.another each preceding zero circuit is opened, thereby preventing short circuiting through the secondary magnet of the preceding series. i

The coil of the circuit breaker magnet 506 is arranged in a. branch 520 of the zero circuit 516. The circuit through this coil is closed only when the circuit bre: kcr 512 has been closed by the operation of the binding circuitol' the fourth series under the fourth impulse, and when also the circuit breaker 513 has been closed by the operation of the binding circuit of the filth series under the fifth iinpulse, and when finally the circuit breaker 39 of the zero circuit 40 has been closed after the filth impulse has ceased. 'lhis energizes the magnet 506 and breaks the binding circuits of lhe-lirst l'our series at the contact 521, releasing all ol' the closed armature switches of these series without disturbing the closed armature siritches ol the 'lilth series. The circuit breaker 512 being operated by the magnet 518 of the fourth series, that circuit breaker is also released and this breaks the circuit through the conductor 522. This breaks the circuit through the coil '01 the magnet 506, releases the circuit breaker 505' and closes the circuit through the conductor ll and restores the apparatus to the initial position, with. the exception of the iilth se rics, in which the closed arinatures are still ninlistu'rbcd.

The apparatus is now ready to receive the next group of impulses, representing the next letter, character or signal, and the impulses of this next group are received and operate the apparatus in the same manner. When the binding circuit of the third series is closed by the action of the third impulse the binding circuit ol the fifth series is broken. ol' the 111th series and restores this series to This releases the closed arinatures senses the initial position. The period oi time during which the closed armatures of the fifth series are held closed is utilized in el'lecting the operation. which the magnet of the filth series is required to perform in printing, recording or indicating the transmitted letter, character or signal, whether by operating the key of a typewriter, a chemical printing apparatus, or other means. i

The binding circuit of the lifth series is broken by any suitable switch. That which is shown consists of a circuit breaker 523 ar ranged in the binding condi'ictor ll of the fifth series. This breaker is actuated quickly by a switch lever-524 having a spring catc 529 which opens the breaker 523 and allows it to close again. The lever 524 is attracted by a magnet 580, the coil ol" which is arrangedin the binding conductor H ol the third series. If preferred, this circuit breaker may be arranged in the second or fourth binding circuit.

I claim as my invention:

1. In a telegraph, the combination of suc cessive series of selecting magnets, the lirst series comprising a selecting magnet which responds to a transmitted plus impulse and a selecting magnet which responds to a transmitted minus impulse, and each following series comprising a pair of magnets for each sclecting magnet of the preceding series, one magnet of the pair responding lea transmitted plus impulse and the other to a transmitted minus impulse, substantially as set forth.

2. In a telegraph, the combination of suc cessive series of selecting magnets, the first series comprising a selecting magnet which responds to a transmitted plus impulse and a selecting magnet which responds to a transmitted minus impulse, and each following series comprising a pair of magnets for each selecting magnet of the preceding series, one magnet of the pairresponding to a trans mitted plus impulse and the other to a transmitted minus impulse, and automatic switches whereby circuits are closed through different magnets of successive series according to the directionof the transmitted impulses, substantiallyas set forth.

3. In a telegraph, the-combination of a re lay which ismoved out of the zero position in one-or the other direction according to the direction of the transmitted impulse, successive series of selecting magnets, the first series comprising a magnet which responds to a transmitted plus impulse and a magnet .which responds to a transmitted minus impulse, and each following series comprising a pair of plus and minus magnets for each selecting magnet of the preceding series, and automatic switches whereby circuits are closed through different magnets of successive series according to the direction of the transmitted impulse, substantially as set forth.

4. The combination of a relay which is moved out of its Zero position in one or the other direction according to the direction of the transmitted impulse, a plus and a minus selecting magnet which respond respectively to plus and minus impulses acting on the relay, and secondary magnets which are controlled by said selecting magnets and are encrgized after said selecting magnets have been energized, substantially as set forth.

5. The combination of a relay which is moved out of its zero position in one or the other direction according to the direction of the transmitted impulse, plus and minus selecting magnets which respond respectively to plus and minus impulses acting onthe relay, secondary magnets which are controlled by said selecting magnets, a circuit in which said secondary magnets are arranged, and

an automatic circuit breaker which breaks said circuit when an impulse actuates said relay and closes said circuit after suchimpulse has ceased, substantially as set forth. i

6. The combination of relay which is moved out of its zero position in one the other direction according to the direction of the transmitted impulse, plus and minus selecting magnets which respond respectively to plus and ininusimpulses acting on the re lay, armature switches for said selecting magnets, corresponding secondary magnets, and circuits in which the cores of said secondary magnets and the armature switches of said selecting magnets are arranged, substantially set forth.

7. The combination of a relay which is moved out of its zero position in one or the other direction according to the direction of the transmitted impulse, plus and minus selecting magnets which respoml respectively to plus and minus impulses acting on the relay, corresponding secondary magnets,

armature switches for said selecting and secondary magnets, and circuits connecting the coil of each selecting magnet with the armature switch of its secondary magnet, substantially as set forth.

8. The combination of a relay which is moved out of its zero position in one or the other direction according to the direction of -r nc-ved out of its zero position in one or the other direction according to the direction of the transmitted impulse, selecting magnets which respond respectively to plus and minus impulses acting on the relay,

a binding circult for said magnets, and means for closing and breaking said bindine circuit automatically, substantially as set forth.

10. The combination ol a relay which moved out ol its Zero position in one or the other direction according; to the direction ol the transmitted impulse, selecting magnets which respond respectively to plus and minus impulsesm-tine onthe relay, a binding; circuit for said magnets means l'or closing said binding; circuit automatically hen said magnets are energized, and means l'or breaking said binding circuit automatically alter the transmit ted impulse has ceased. substantially as set forth.

11. The combination of a relay which is moved out of its zero position in one or the other direction according to the direction, of the transmitted Impulse, successive series of selecting magnets, each series comprising magnets which respond respectively to plus and minus impulses acting: on the relay, binding circuits for said magnets, means for automatically closing said binding circuits, and means for breaking; the binding circuits of successive series ot magnets simultaneously, substantially as setl'orth.

12. The combination ot a relay which. is

l l l l moved out of-its zero position in one or the other directionaccording to the direction of the transmitted impulse, successive se'ri es of selecting magnets, each series comprising magnets which respond respectively to Ins and minus impulses acting on the re ay, binding, circuits for said magnets, means for automatically closing said. binding circuits, and means for holding the binding circuit-of the last series closed, While the binding circuits or preceding series are broken, substantially as set forth. 1

13. The combination of a relay which is moved out of its zero position in one or the other direction according to the direction of the transmitted impulse, successive series of selecting mae uets, each series comprising magnets \\'l l('ll. respond respectively to plus and minus impulses acting on the relay, binding circuits for said magnets, means for automatieally closing said binding circuits, and means for breaking the binding circuit of the last series upon closingv the binding cir cuit of a preceding series bya subsequent impulse, substantially as set forth.

W itness my hand this 30th day of N ovember, 1906.

All itl ll) MOSS ROBERTS.

-Witnesses:

Enwaan VVILIIELM, O. B. llORNBEGK. 

